Auditory responses of neurones in the lateral mesencephalic nucleus (inferior colliculus) of the Barbary dove

Biederman-Thorson, Marguerite

doi:10.1113/jphysiol.1967.sp008389

Cited by 28 publications

(2 citation statements)

References 13 publications

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“…The MLD is a large nonlaminated nucleus of medium-sized cells and is centrally situated in a large mass of gray, lying beneath the ventricle of the optic lobe, which is called the tONS semicircularis. It receives afTerents from the lateral lemniscus, and on this basis, as well as on the basis of electrophysiological evidence (Harman & Phillips, 1967;Biederman-Thorson, 1967), it is homologous to the central nucleus of the inferior colliculus of mammals and an equivalent nucleus in amphibians (Potter, 1965).…”

Section: Discussionmentioning

confidence: 99%

The Anatomy of the Avian Auditory System

Boord

1969

Annals of the New York Academy of Sciences

150

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Section: Discussionmentioning

confidence: 99%

The Anatomy of the Avian Auditory System

Boord

1969

Annals of the New York Academy of Sciences

150

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“…Brown's (1965a) conclusion based on unsatisfactory older evidence, the nucleus meseneephalicus lateralis dorsalis has been proved beyond doubt to be the avian homologne of the inferior eolliculus. Boord (1968) has shown that lesions of the cochlear nucleus lead to terminal degeneration in this nucleus and Biederman Thorson (1967) has shown that its neurons are specifically responsive to sound.…”

Section: Discussionmentioning

confidence: 99%

Neural substrates of vocalizations in gulls and pigeons

Delius

1971

Exp Brain Res

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Vocalizations were obtained by electrically stimulating the inferior co]liculus, the auditory thalamic nucleus and a media] hypothalamic nucleus of awake, unrestrained herring gulls, lesser black-backed gulls and pigeons. The significance of the involvement of auditory centres in the motor control of avian calling is discussed. The wide gammut of calls and accompanying behaviour that was elicited is described and related to the normal behaviour, typical of the species concerned. A difference between immature gulls and adult pigeons regarding this relationship is attributed to their differing hormonal states. Attention is drawn to the heterogeneity of temporal characteristics associated with the stimulus induced responses even when elicited from virtually the same site. Incorporating earlier work on the central mechanism of avian vocalizations and based on anatomical, physiological and behavioural considerations it is tentatively concluded that the neural structures involved are linearly organized into a teleneephalofugal, efferent system. It is suggested that the inferior colliculus incorporates the origin of a final common pathway to medular motor centres for all vocalization generating structures.

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Ascending connections of a midbrain auditory area in a crocodile, Caiman crocodilus

Pritz

1974

J of Comparative Neurology

110

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The torus semicircularis is a tonotopically organized auditory region in the midbrain of the crocodile, Caiman crocodilus (Manley, '71 ) . 'I"wo distinct regions of the torus can be distinguished in Caiman: an external nucleus, which is continuous with the deep layers of the optic tectum, and a central nucleus. Ascending connections of the central nucleus were studied with the light microscope by means of the Fink-Heimer procedure after unilateral, anodal stereotaxic lesions. Efferent axons leave the central nucleus in the lateral lemniscus to enter the tecto-reuniens tract where they course as far rostrally as nucleus Z. At this level, this bundle bifurcates. The majority of these fibers turn medially and then pass through and probably synapse on interposed neurons of nucleus Z, prior to their termination in nucleus reuniens. The remaining axons continue ventrally past nucleus Z to enter the ventral supraoptic decussation where they travel anteriorly to a level just posterior to the optic chiasm. Here the fascicles cross the midline and swing caudally, still in the ventral supraoptic decussation, until they reach nucleus Z of the contralateral side. At this level, these fibers enter the tecto-reuniens tract and turn medially, to pass through and perhaps end on the intercalated neurons of nucleus Z, prior to their termination in nucleus reuniens. The neuronal architecture of nucleus Z and that of the nucleus reuniens complex are described. The latter, a midline nuclear group, consists of two subdivisions: a pars centralis and a pars diffusa. Each of these subdivisions is segregated into two neuronal aggregates at the midline. Efferents of the central nucleus terminate massively in the pars centralis and, to a considerably lesser extent, in the pars diffusa of nucleus reuniens.The results of this study are compared with similar ones in pigeons and mammals. Parallels in the fiber connections of midbrain auditory and visual areas and the segregation of these modalities in the mesencephalon and diencephalon are discussed.It has been suggested that if a receptor has a special function, it should have a separate central representation (Lorente de N6, ' 3 3 ) . Audition, somatosensation, and vision each possess receptors that are special in that each is differentially sensitive to a particular form of energy. In most vertebrates, these modalities remain separate in the periphery. In many mammals, each of these modalities remains separate in its central connections. This feature of neural organization is not unique to mammals since auditory and visual systems of pigeons remain segregated not only in the periphery but also in the midbrain, thalamus, and telencephalon (Boord, '68; J. COMP. NEUR., 153: 179-198.

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Auditory responses of neurones in the lateral mesencephalic nucleus (inferior colliculus) of the Barbary dove

Cited by 28 publications

References 13 publications

The Anatomy of the Avian Auditory System

The Anatomy of the Avian Auditory System

Neural substrates of vocalizations in gulls and pigeons

Ascending connections of a midbrain auditory area in a crocodile, Caiman crocodilus

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